Terminal for electrical apparatus.



W. B. POTTER.

TERMINAL FOR ELECTRICAL APPARATUS.

APPLICATION FILED SEPT. 7. 1907.

973,560. Patented 001;. 25, 1910.

WITNEEEES: INVENTHR g! WILLIAM EJPUT ER,

ATTY.

UNITED STATES PATENT QFFIQE mm B. POTTER, OF SCHENECTADY, NEW YORK,ASSIGNOB 'I'O GENERAL- ELECTRIC COMPANY, A CORPORATION OF NEW'YOBK.

TER lIINA Ii FOB ELECT-RICH APPARATUS.

Specification .51 Letters 2mm.

PatentedOct. 25, 1910.

Application filed September 7, 1907. Serial No. 391,770. I

To all whom it may concern:

Be it known that I, WILLIAM B. PO'ITER,

a citizen of the United States, residin at Schenectady, county ofSchenectady, tate of New York, have invented certain new plicable tovapor electric apparatus ofla-rge size carryin heavy currents.

The nove features of my invention are particularly ointed out in theappended claims, and or a better understanding of the same reference maybe had-to the following detailed description taken in connection wviththe accompanying drawing.

The drawing shows a conductor 1, which may be ofcopper or othermaterial, carrying an electrode 2 suitable for use as anode .in amercury vapor rectifier or similardevice. Surrounding a portion ofconductor 1 and brazed-thereto or integral therewith is asleeve 3 havinga tapered outer surface 4. It also has a recess 5 underlying thistapered portion to render the tapered walls resilient or yielding. Thetapered surface 4 v of the sleevegtits -tightly within a tube 6 ofinsulating material, such as porcelain. The

' tapered joint may have aground fit and the pendof sleeve 3. Theinsulatin two members may be locked together by means of a nut 7screw-threaded to the lower tube 6 is likewise tapered on its outer surace 8 to fit be maintaine .mercury arc device, it may be 'lin theopening in a casing 9, and the tapered joint may be (ground to a tightfit and may tight by means of a nut 10 hearing on an annular flan e 11integral with t e porcelain tube.- On y a ortion of the isshown, butwhen t is casing is of metal and forms the" 'envelpp for a with a"conductor passing into sai j refractory insulating material 12, asshown in the drawing. 7

If desired, he tapered joints above mentioned may be further sealed bymeansof mercury held in the annular channels between the several parts,as indicated at 13 and 14 in the drawing.

The yielding nature of the tapered ortion' of sleeve 3 prevents anytrouble rom unequal expansion of the several parts of the terminal.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is,-.

L'The combination of an air-tight cas' ing, an insulating tube fittedthereto with a tapered joint, and aconductive member passed through saidtube and having a resilient tapered portion fitting tightly within saidtube.

2. The combination of an air-tight easing,

. an insulating tube forming a tight fit. there-v with, and a conductorpassin through said tube and having a sleeve yiel ingly connecting witha tapered surface within said tube.

3. The combination with a vacuum tight. casing, of an insulating tubeand a conductive member, and means affording a yielding air-tight jointbetween said conductor and said tube.

4. The combination with an air-tight chamber, of a mercury va' 1'apparatus, a d casing, a. sleeve carried on said 'conductor and havingatapered portion with yielding walls, a tube engagin said taperedportion andforming an alr-tight joint'therewith, and a body of mercuryfor excluding air from said tapered o1nt.'

5. The combination of an air-tight casing,

a conductor passing into said casing, a taered member for 'preventinleakage of air into said casing, and a yiel ing sleeve contacting withsaidftap'ered member to compensate for unequal expansion between saidconductor and said tapered member.

6. The combination of an air-tight casing,

a conductor passing into said-casing and car an anode -.fac?. :iea bysai tube fitting tightly 5 face-and forming said casing and means for inposition.

.7. The combination with an air-tight metaloaslngii I 0 ing into sa 9.taipered bearin surconductor, an insu ating against said taperedsuranair-tight joint; with looking said tube of a conductive memberpasscasing, and 'a. tubular tapered elosure with a resilient tubularpackin wedged between said tubular ,closure an said conductive member,and means for locking said tubular closure in position.

In'wit-ness whereof, I ham hereunto set 1 5 my hand this 5th day ofSetember, 1907. WILLIAM h. POTTER. -Witnesses: w BENJAMIN B. HULL, BERTHASECOR.

